Negker



(No Model.)

J. ,G. REINEGKER.

MACHINE FOR MANUFAGTIIPRING RELIEVED FORMED REVOLVING TQOLS. No. 519,820. I Patented May 15,1894.

UNITED STATES PATENT OFFICE.

JOIIANNES G. REINECKER, 0F GABLJN'Z, NEAR CIIEMNITZ, GERMANXY MACHINE FOR MANUFACTURING RELIEVED-FORMED REVOlVlNG TOOLS.

SPECIFICATION forming part of Letters Patent No. 519,820, dated May 15, 1894. Application tiled August 24, 1893. Serial lilo. 483,929. (No model.)

To all whom it may concern.-

Be it known that LJOHANNES Goons REI- NECKER, a subject of the Kingof Saxony, re; siding at Gablenz, near Chemnitz, in the King dom of Saxony, German Empire, have invented new and useful Improvements in Machines for Manufacturing Relieved-Formed Revolw ing Tools,of which the following is a specification.

My invention relates to improvements in the manufacture of revolving cutters such as are used for working metal, wood, stone, leather and other like material, and which tools are commonly designed to out such ma terial in profile.

The object of my invention is to overcome the difficulties at present experienced in the manufacture of the said tools which ditliculties result from the necessity of cutting or backing ofl'f the tools on the whole of their breadth at once. This can, at present, only .be done by means of veryexpensive tools operated by heavy machines and even in this case, only such tools can be produced which have no spiral or twisted grooves. Tools with twisted or spiral grooves, nevertheless, have a great advantage over those with straight grooves, especially in the case of cutters of considerable breadth, for the reason that they produce a more accurate surface, and offer less resistance and therefore require less power to drive them. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a vertical cross section of a turniugdathe provided with the improvements constituting my invention. Fig. 2 is a plan. of the machine. Fig. 3 is a side view in part, and Fig. 4 is a detail view of a cam hereinafter described.

Similarletters refer to similar partsthroughout the several views.

A represents the bed of a turning lathe, upon which is mounted a slide-rest I, provided with a hub Z, bored out so as to form a hearing for a spindle I), a suitable lining being 1 preferably inserted between the spindle and the said hub Z. The said spindle is provided on one end with a pinion of engaging with a pinion a. fixed upon the driving Shaft and on the other end is secured a cam c, the form. or shape of which is clearly seen in the detail view, Fig. 4. A plate Z is secured upon the slide-rest Z by means of=screwbolts Zfland forms a sliding bed fora slide a which moves in a transverse direction to the slide rest I. The slide e-ou its lower side at one extremity carries a pin d and is provided at its opposite extremity with a projection e. -0ne or more springs f arranged in recesses in the plate I and pressing against a screw bolt 6 carried by the said projection of theslide e, tend to press the pin (1 against the surface ofthe cam c. On rotating this cam cin the direction of the arrow shown in Fig. 4 the slide e is alternately movedforward by the cam and broughtback 7 again by the action of thesprings f; this movement being timed in such a manner that for each revolution of tho blanklfrom which the tool is to be produced) the cam 0 makes a number of revolutions corresponding to the number of teeth to be'formed on thesaid blank, during one revolution of the latter.

A plate g is fixed on the slide a by means of set screws g g, and is provided witl1 a.n extension g which has formed therein grooves for receiving a blade h carrying the former 2'.

Lateral guides k, 7.; secured to the frame A,

project upward and are so arranged as to allow the said blade h to move only in atransverse direction. Upon the said plate 9 rest's a sliding plate m capable of being adjusted by sprin gs m and set screws m passing through the projection on the plate 9, the said plate 111. having secured thereto the follower or guiding pin 72- which is arranged on the same level as and engages with a. former 2, the said follower a beingconstantly pressed against the former i by the springs m. To the plate m is attached the tool holdero which may be adjusted thereon by set screws 0' the said tool holder carrying the turning tool 9 which is secured thereto by set screws 0 and formed-at its operating end of the same shape as the follower 1;. Screw o is for feeding forward the cutter (Fig. l).

The operation of the improved machine is as fo1lows:''.lhe shaft nbeing revolved the cam c is moved around its axis (see Fig. 4) and, by reason of its cooperation with the pin d, a reciprocating. motion is imparted to the slide a, plate g, blade h, former 2" as well. as plate m, follower 12., head 0 and tool p. This constitutes the so called relieving or backby means of the guide arms k, prevented In this way the Lfrom following this motion. follower n is caused to slide along the former c and in consequence thereof the turning-tool p, performing a motion similar to that of the follower n, will produce a cutter whichwill conform in shape to that of the former i. If a tool with straight grooves arranged parallel to the axis is to be produced, the cam 0 must accurately perform as many revolutions as there are teeth to be cut on the blank; but it tools with spiral or twisted grooves or flutes wound in a right or left handed direction are "to befproduced,then the movementof the shaft a driving the cam 0 must either be-retarded or accelerated. This being performed in a manner and by means well known to those skilled intheart, no further explanation is needed.

I am aware, that in the manufacture of wooden articles, formers in combination with followers have been employed, but

What I claim, and desire to secure by Let ters Patent, is

1. In a machine for relieving or backing off revolving cutters, the combination of the slide rest 1- carrying slide 6 and adjustable plate m having the follower n and turning 'toolp secured thereto, with blade hand former 'i guided by arms k, 7; fixed to the frame of the machine and means for impartine a refixed arms 70, k guiding the said blade in transverse direction substantially as and for the purpose specified.

3. The combination of the bed A, slide rest l plate I secured thereto, slide c adaptedto move in guides on said plate 1 pm (I secured -to slide e a cam 0 adapted to engage with pin d and maintained in contact therewith by springs f in operative connection with the slide e the tool holder 0 connected with slide 6 and means for limiting' the travel of said holder, substantially as set forth.

55 4. The combination of the bed slide rest 1 plate :1 slide e provided with a pm d which engages with a cam c the plate g secured to slide a blade 71. provided with a former i guides r k k for said blade fixed to the'bedA and the 60 adjustable plate m connected to plate g by springs m and screws m and provided with a follower 'n and tool holder 0 operating as and for the purpose specified.

In testimony whereof I have hereunto set 65 my hand in the presence of two subscribing witnesses.

JOHANNES G. REINECKER.

\Vitn'esses: I

C. J. DIE'riucH, R. GUST. WOL 

